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<div><span class="kw">theorem </span><a NAME="T30"><span class="comment"><font color="firebrick">:: ROBBINS4:30</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">L</font> being   <a href="robbins3.html#NM1" title="ROBBINS3:NM.1">Ortholattice</a><br/>  for <font color="Olive" title="b2">a</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Olive" title="b1">L</font> holds <br/> ( <font color="Olive" title="b2">a</font> <a href="robbins4.html#NR2" title="ROBBINS4:NR.2">_|_</a> <font color="Olive" title="b2">a</font> iff <font color="Olive" title="b2">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <font color="Olive" title="b1">L</font> )</div></div>
